Lathe.



0. W. SGHAUM.

LATHE.

, APPLTGATION FILED JAN. 31. 1910. 1 1,001,993, Patented Aug. 29, 1911.

2 sums-sum 1.

INVENTOR BY U ATTORNEY.

0. W. SGHAUM.

LATHE. APPLICATION FILED JAN. @1. 1910,

Patented 31111 .29, 1911.

2 BHBBTFSHHET 2.

llllllll'l 1m lllliillllll mm 1 N V EN TOR 11 7 TOR NE Y WITNESSES:

UNITED STATES PATENT OFFICE.

OTTO W. SCHAU M', OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T FAY MACHINE TOOL COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENN- other sides of SYLVANIA.

LATHE.

Specification of Letters Patent.

Patented Aug. 29, 1911.

To all whom it may concern:

Be it known that I, Orro W. SCHAU'M, a

citizen of the United States, and resident of Philadelphia, in the State of Pennsylvania, have invented certain new and useful. Improvements in Lathes, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a,part of this specification.

My invention relates to that class of machine tools commonly known as 'lathes, wherein are employed a rotatable shaft, a holder carried by the shaft and adapted to hold and rotate the work or blank to be treated, cutting tools movable relatively to the work holder and to each other, and means for moving the cutting tools to act upon the work or blank carried by the holder during the rotation thereof, whereby a multiplicity of operations may be simultaneously performed upon the same work or blank. In operating upon'blanks of various kinds in machines of this character, it frequently-becomes necessary, in order to save time in finishing the'blank to operate a cutting tool from the side of the work or blank occupied by the shaft which is rotating the blank, thereby permitting other cutting tools to be operated from.

' e blank.

The objec't o jmy invention, as generally stated, is to provide a'lathe with a hollow shaft carrying a work holder and means for rotating the "same-in combination with a 1 tool holder and means for operatin the tool holder through the hollow sha t by mechanism ,Of the. lathe during the rotation of the hollow shaft; and a further object, ofthe'invention is to provide, in addition to thetool holder operated through the hollow shaft, a simple and efilcient means for supporting and operating another tool holder or holders, relatively to the Work holder durlng the operation of the lathe;

The invention is adapted to be used in connection with the mechanism of the lathe,

disclosedin Letters Patent of the United States No. 910,466, dated January 19, 1909, to which reference may be had; and the invention also may be employed in connection with. other lathes of similar-character.

One form of embodiment of theinveution is illustrated in t e accompanying drawings on the head stock in'gs which will be hereinaf er fully described, following which the precise nature of the invention will be particularly pointed out in the claims.

4 In the drawings :---F igure 1 is a side eleration of a lathe embodying myinvention. Fig. 2 is a longitudinal vertical section thereof, partly broken away. Fig.3 is a transverse section on line 3-3 of Fig. 2. Fig. 4 is a transverse section on line H of Fig. 2. Fig. 5 is an elevation of a portion of the side frame of the machine opposite to the side shown in Fig. 1, showing the speed reducing gears.

I The main frame of the lathe may be --of any desired form, and as illustrated in the drawings it comprisesthe bed 5 and the supporting standards 6 therefor. Rising fromone end of the bed 5 is the head stock 7 in which is mounted a hollow rotatable shziit8 constituting the lathe spindle. The inner en of the hollow shaft or spindle 8 is provided with a chuck 9 or other suitable device adapted to receive and hold the work or blank to be acted upon by the cutting tools of the lathe, and causelthe work or blank to be rotated any desired form to meet any desired requirem'ents, and it may be modified to meet the various requirements of different blanks to beacted upon by the machine;

Formed on or secured to the hollow shaft or spindle 8 is a worm wheel 10 engaged by a worm 11 on. the main driving shaft'12 which is mounted to rotate in suitable bear- 7. The drivingshi ft 12 is provided with'a pulley 13 driven by a, belt 14 from an outside source of power. It will thus be seen that when the shaft .12 rotated, the worm 11 will slowly rotate the worm wheel.10' and therewith the hollow shaft or spindle 8- holder. 9.

Mounted to slide lon 'tudinally within thehollow shaft Sis a. Sfillft or tool holder 15 the inner end of which carries a cutting tool 16 which may be of any desired form to meet any desiredrequiremen-t. As illuse trated in the-drawings, the cutting tool 16 'is a reamer provided with a shank 17 which carrying the workis screw-threaded and screwed into the in-f ner endof the shaft or tool holder 15. The. outer end of the shaft or tool holder 15 ex" t t-ends beyond the outer endof'the] hollow shaft or spindle 8 and into a sleeve 18 arranged in axial alinement with the shaft 8 7 and having its inner end secured to the head 44 which in. turn coacts with-a gear "wheel.

. 45secured to the shaft 31. v

seen'that during the actuation of the pulley nal movement thereof. The lower end or" the arm 21 is provided with,a roller'22 arranged directly above a hollow rotatable cam carrier or cylinder'23, the outer face of which is provided with suitable cams 24 adapted, to engage the roller 22 and move.

the shaft or tool holder 15 longitudinally within'the shaft or spindle 8 during thero tation of the cam carrier. The cam carrier 23 is formed on or secured to a worm wheel 25 provided with a hub or sleeve 26 which surrounds a shaft 27 and is mounted to rotate in bearing 28 on the main frame of the machine. The outer end of the cam carrier 23 is provided with a suitable brace 29* which surrounds the shaft 27. The worm wheel 25 is engaged by a worm 30 fixed to a transverse shaft 31 which is mounted in'suitable bearings on the main frame. Loosely mounted on the shaft 31 is a pulley 32 driven by a belt 33 from a pul ley 34 on the main shaft 12.

The shaft 31 may be actuated direct from the pulley 32 or it may be actuated through a set of spedmeducing gears as follows: Formed on orsecured to the hub of the pill ley 32, is a pinion 35 which coacts with a gear wheel on one end of 'a shaft 37 which extends transversely through the bed 5 of the machine and is journaled in bearin s' therein. 'The other end of the shaft 37 1s provided with a pinion 38 coacting with a gear wheel 39 the hub of which carries a pinion 40 which coacts with a gear wheel- 41. The hub oflthei gear wheel 41 is provided with a gear wheel 42 coacting with a pinion This pinion 43, coacts with a gear wheel It will thus be 32 from the main driving shaft 12, the shaft 31 and worm 30 will be slowly rotated,.there byslowly rotating the 'worm' wheel25- and therewith the'cam carrier 23.

The shaft '27, here'inbefore referred to, is longitudinally movable through the ma-' chine, and it is supported by the hub. or s1eeve 26 of the worm wheel 25 and also'by a' carriage 46 :which is mounted upon suit- 5 ble' guides on the bed 5 i a manner t6 be movablethereon longitudinally of themaspect to each other and to the Work holder chine toward and from the chuck or work holder 9, the carriage 46 being secured to the shaft 27 by suitable screws 47 Secured to the shaft 27 within the hollow cam carrier 23 is an arm 48 carrying a roller 49. This roller 49 is arranged adjacent the inner wall of the cam carrier 23 and is adapted to be acted upon by cams 50 to move the shaft 27 and therewith the carriage 46 longitudinally of the machine during the rotation of the camcarrier 23. r

. The carriage 46 is provided with guides 51 extending longitudinally of'the machine movable with respect to the carriage 46. The carriage 52 is provided with a suitable tool 54, the cutting tool illustrated in the drawings being a drill, arranged in axial alinementfwith the cuttingtool. 16 and'extending from the tool holder 53 towardthe chuck 9. The under side ofthe carriage 52 is provided with a longitudinallyextending gear rack 55 which is engaged bythe teeth of a gear wheel 56 on a transverse shaft 57.

j parallel to the shaft 27, and fitted to the -guides 51 is a second carriage 52 which'is tool holder 53 to which is secured a cutting The shaft 57 extends through and is mounted to turn in one of the side walls of the carriage 46. The outer end of theshaft 57 is provided with a suitable hand wheel 58 by meal is of which the shaft 57 may be turned to turn thegearwheel '56 and cause it toen gage the rack 55. to adjust the carriage 52' andv therewith the tool 'holder 53 longitudi nally of the machine with respect to the carriage'46. Suitable set screws 46 are provided which extend through the carriage 46 and are adapted to engage the carriage 52 tohold it in positions of adjustment on the carriage 46,

By the construction hereinbefore described, it will be seen "that the tool holder;15 may be operated from the sidefof the; work holder 9 occupied by the spindle8, an'd that the tool holder 53 may be operatedifrom the opposite side of the 'Work,"and also that the two tool holders 15 and 5'3may be both operated by the same camcarrier 23; 'and it will also be seen that by changing the, con

tours of the cams 24- and 50 'for controlling may .be given to the tool holders 'withre- 9, to perform many different operations upon the work carried by the work holder;

In the drawin I have shown the tool machine arranged to first bore or drill a hole in ablank 60 and then ream the wall of the hole. 1 v

The chuck or work holder 9' is open at its center and the work or blank 60 1s secured the movements of the tool holders 15 and' 53, respectively, many different movements holder 9'p'rovide with the reamer 16, and .the tool holder 53 provided with the drill or; boring tool 54, and I. have shown the iifleseribed thereto with its center inaxial alinement with the spindle 8 andcutting tools 16 and When power is applied to the main driving shaft 12, the workholder 9 and therewith the work 60 is rotated at asuitable speed while the cam carrier 23 is rotated at a relatively slower speed, as previously explained; The contours of the canine 24 and 50 contriiilling the cutting tools 16 and 54, respectively, are such that dur ing the rotation of the cam carrier 23 the drill 51- will be advanced through the work (it) to bore or drill a hole therein; whereupon the drill will. be withdrawn from the work andthe reamer 16 will be advanced through the hole to ream the wall thereof, after which the reamer'lti will be withdrawn from the hole.

In'the form of embodiment of the invention shown and described herein, the shaft 31. and its actuating i'nechanism are precisely like the shaft 18 and the actuating mech anism therefor of the mhchine shown and described in U. S. Letters Patent N 0. 910,466,

hereinbefore referred to; and when the invention is used in connection With a machine of the character shown and described in said Letters Patent, the stop motion shown and therein may be employed to autonnltically stop the operation of the lathe after the cuttingtools 16 and 54 have I claim:

1. In a lathe, the combination of a si1pmi-ting frame provided with a parthaving a slot therein, a hollow rotatable shaft, a work holder carried by the shaft, means for rotating the shaft, a tool holder within the shaft, a part n-ojeating from the tool holder per 'formedtheilr operations upon the work 60.

into said slot and preventing rotation of the tool holder while permitting movement of the tool holder longitudinally of. the shaft,

and means for automatically moving the tool holder longitudinally of the shaft during the rotation of the shaft.

2. In a lathe the combination of a supporting frame, a hollow rotatable shaft, a work holder carried by the shaft, means for rotating the shaft, a tool holder within the shaft, .a sleeve fixed to said frame and extending in axial alinement with said shaft, said sleeve having a longitudinal slot therein, a part projecting from the tool holder and into said slot, and means acting upon said part and moving said tool holder 1ongitudinally of said shaft during the rotation of the shaft. i

3. In a lathe, the combination ofa supporting frame, a hollow rotatable shaft. a Work holder carried by the shaft, means for rotating the shaft, a tool holder within the shaft, a sleeve fixed to said frame and extending in axial alinement with said shaft, said sleeve having a longitudinal slot there- 'in, a part projecting from the tool holder and into said slot, a cam arranged to act upon said part and move the tool holder longitudinally of said shaft, and means for supporting and actuating the cam during the actuation of the shaft. 1 a

In testimony whereof, I have hereunto afiixed my signature this 27th day of January A. D. 1910.

OTTO \V. SCHAUM. I

Witnesses:

A. M. BIDDLE, R. A. DUNLAP. 

